The input work expression and the thermodynamics-based modelling framework for unsaturated expansive soils with double porosity

In this paper, based on the porous media theory, the specific expressions of the total stress and the input work of unsaturated expansive soils with double porosity are proposed, and then the energy-conjugate variables are further derived. We make distinctions between the effects of capillary water...

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Bibliographic Details
Published in:Chinese science bulletin 2013-09, Vol.58 (27), p.3422-3429
Main Authors: Li, Jian, Zhao, ChengGang, Cai, GuoQing, Asreazad, Saman, Xu, Xi Frank, Huang, QiDi
Format: Article
Language:English
Subjects:
Chemistry/Food Science
Deformation effects
Earth Sciences
Engineering
Expansion
Humanities and Social Sciences
Life Sciences
Macrostructure
Modelling
multidisciplinary
Physics
porosity
Porous media
Science
Science (multidisciplinary)
Soil porosity
Soil water
thermodynamics
unsaturated conditions
Unsaturated soils
双重介质
多孔介质
宏观结构
工作表
建模框架
热力学系统
输入饱和
非饱和膨胀土
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Summary:In this paper, based on the porous media theory, the specific expressions of the total stress and the input work of unsaturated expansive soils with double porosity are proposed, and then the energy-conjugate variables are further derived. We make distinctions between the effects of capillary water and adsorbed water on the soil behaviour, as well as between the deformations of micro- and macrostructure. According to the derived input work expression and the work-energy-dissipation relations for an open multiphase thermodynamic system, we establish a thermodynamics-based modelling framework for unsaturated expansive soils with double porosity.
ISSN:1001-6538
1861-9541
DOI:10.1007/s11434-013-5828-9